3964093
Breather Housing
Cummins®

The Cummins Breather Housing, part number 3964093, is a critical component designed for commercial trucks. It plays a vital role in the engine system, contributing to the vehicle’s overall operation and efficiency. This part is integral to the crankcase ventilation system, ensuring optimal engine conditions.

Basic Concepts of Breather Housing

A breather housing facilitates the regulated exchange of air within an engine’s crankcase. It vents pressurized gases and contaminants that accumulate during engine operation, which is vital for maintaining engine health and preventing the buildup of harmful substances that could lead to decreased performance or damage ¹. The breather housing works in conjunction with other engine components to ensure balanced and efficient operation.

Purpose of Breather Housing 3964093

The Breather Housing 3964093 is designed to manage the flow of gases and contaminants out of the engine’s crankcase. This part helps maintain a clean and pressurized environment within the crankcase, which is necessary for the proper lubrication and cooling of engine components. By facilitating the removal of contaminants, it contributes to the engine’s longevity and performance ².

Key Features

The Breather Housing 3964093 is constructed from durable materials resistant to harsh engine conditions. Its design includes features that enhance performance and durability, such as precise engineering for a proper fit and function within the engine system. It may also incorporate elements that improve efficiency in venting gases and contaminants, contributing to the overall reliability of the engine ³.

Benefits

Using the Breather Housing 3964093 can lead to improved engine performance by ensuring the crankcase remains free of contaminants that could impede engine function. This part contributes to extended component life by maintaining a clean environment within the engine, reducing wear on critical parts. Furthermore, it enhances the reliability of heavy-duty applications by supporting the efficient operation of the engine under demanding conditions ⁴.

Troubleshooting and Maintenance

Common issues associated with breather housings include blockages or leaks, which can affect engine performance. Troubleshooting these problems involves inspecting the part for signs of damage or wear and ensuring it is properly installed and functioning as intended. Regular maintenance practices, such as cleaning or replacing the breather housing as needed, can help ensure optimal performance and longevity of this Cummins part.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins serves commercial, industrial, and automotive markets worldwide. The company is committed to advancing technology and providing reliable solutions that meet the needs of its customers in various industries.

Breather Housing Compatibility with Cummins Engines

The Breather Housing part 3964093, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part plays a crucial role in the engine’s ventilation system, ensuring that the crankcase is properly ventilated to prevent pressure build-up and maintain engine health.

Engines Compatible with Breather Housing 3964093

• 6C8.3
• ISC CM850
• ISL9 CM2150 SN
• ISL9.5 CM2880 L138
• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L9 CM2670 L128B
• L9.5 L117
• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM554
• QSL9 CM850 (CM2850)
• QSL9.3 CM2880 L113

Grouping of Compatible Engines

The breather housing part 3964093 is versatile and fits a broad range of Cummins engines. Here is a grouping of the engines based on their series and specifications:

• 6C8.3 Series

  • 6C8.3

• ISC Series

  • ISC CM850

• ISL Series

  • ISL9 CM2150 SN
  • ISL9.5 CM2880 L138

• L8.9 Series

  • L8.9
  • L8.9 CM2670 L134C
  • L8.9 L121

• L9 Series

  • L9 CM2670 L128B
  • L9.5 L117

• QSC Series

  • QSC8.3 CM2880 C102
  • QSC8.3 CM554
  • QSC8.3 CM850 (CM2850)
  • QSC9 CM2250 / QSL9 CM2250

• QSL Series

  • QSL8.9 CM2150 L141
  • QSL9 CM554
  • QSL9 CM850 (CM2850)
  • QSL9.3 CM2880 L113

This compatibility ensures that the breather housing can be used across multiple engine models, providing a reliable solution for maintaining proper engine ventilation.

Role of Part 3964093 Breather Housing in Engine Systems

The Part 3964093 Breather Housing is an essential component in the efficient operation of engine systems, particularly when integrated with the crankcase breather and valve cover.

Integration with Crankcase Breather

The crankcase breather system is designed to release pressure that builds up inside the crankcase as a result of blow-by gases escaping past the piston rings. The Breather Housing plays a significant role here by providing a controlled pathway for these gases to exit the crankcase. This ensures that the pressure does not exceed safe levels, which could otherwise lead to oil leaks or even engine damage. The housing is typically connected to the crankcase via a hose or pipe, allowing the gases to be vented either into the atmosphere or recirculated back into the intake system, depending on the engine’s design.

Interaction with Valve Cover

The valve cover is another component where the Breather Housing finds its application. The valve cover seals the top of the engine, protecting the camshaft, valve train, and other internal components. As the engine operates, it produces vapors and gases that need to be managed to prevent contamination and ensure optimal engine performance. The Breather Housing, when attached to the valve cover, facilitates the venting of these gases. It may also incorporate a PCV (Positive Crankcase Ventilation) valve to regulate the flow of gases, ensuring they are either expelled or recirculated in a manner that minimizes emissions and maximizes efficiency.

In both applications, the Breather Housing serves as a vital link in the engine’s ventilation system, ensuring that gases are properly managed to maintain engine health and performance. Its design and placement are tailored to work in concert with these components, enhancing the overall functionality of the engine system.

Conclusion

The Cummins Breather Housing, part number 3964093, is a crucial component for maintaining the health and efficiency of commercial truck engines. By ensuring proper ventilation and contaminant removal within the crankcase, this part contributes to extended engine life, improved performance, and reliable operation under demanding conditions. Regular maintenance and proper installation are essential to maximize the benefits of this component.